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Roaldite Mineral Data
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General Roaldite Information
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 Chemical Formula: |
(Fe,Ni)4N |
| Composition: |
Molecular Weight = 237.96 gm |
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Iron 89.18 % Fe |
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Nickel 4.93 % Ni |
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Nitrogen 5.89 % N |
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______ |
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100.00 % |
| Empirical Formula: |
Fe2+3.8Ni0.2N |
| Environment: |
Platelets in kamacite phase of coarse octahedrites. |
| IMA Status: |
Approved IMA 1981 |
| Locality: |
Jerslev meteorite, Sjaelland, Denmark and Youndegin meteorite, Avon, Western Australia, Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named in 1981 for Roald Nielsen (b.1928), Danish metallurgist. |
| Name Pronunciation: |
Roaldite  |
| Synonym: |
ICSD 79980 |
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PDF 6-627 |
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Roaldite Crystallography
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| Cell Dimensions: |
a = 3.79, Z = 1; V = 54.44 Den(Calc)= 7.26 |
| Crystal System: |
Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 43m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.191(1), 1.144(0.85), 1.897(0.75), |
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Physical Properties of Roaldite
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| Color: |
Tin white. |
| Density: |
7.21 |
| Diaphaneity: |
Opaque |
| Hardness: |
5.5-6.5 - Knife Blade-Pyrite |
| Luster: |
Metallic |
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Calculated Properties of Roaldite
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| Electron Density: |
Bulk Density (Electron Density)=6.80 gm/cc
note: Specific Gravity of Roaldite =7.26 gm/cc.
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| Fermion Index: |
Fermion Index = 0.07
Boson Index = 0.93 |
| Photoelectric: |
PERoaldite = 29.58 barns/electron
U=PERoaldite x rElectron Density= 201.06 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Roaldite is Not Radioactive |
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Roaldite Classification
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| Dana Class: |
01.01.18.02 (01)Native Elements |
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(01.01)with metallic elements other than the platinum group |
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(01.01.18)Dana Group |
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01.01.18.01 Siderazot Fe5N2 P 6322 6 2 2 |
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01.01.18.02 Roaldite (Fe,Ni)4N P 43m 4 3m |
| Strunz Class: |
01.BC.05 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides) |
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01.B - Metallic Carbides, Silicides, Nitrides and Phosphides |
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01.BC -Nitrides |
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01.BC.05 Roaldite (Fe,Ni)4N P 43m 4 3m |
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Other Roaldite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Roaldite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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Print or Cut-and-Paste your Roaldite Specimen Label here :
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Roaldite
(Fe,Ni)4N
Dana No: 01.01.18.02 Strunz No: 01.BC.05
Locality:
Notes:
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